Reversible discharge flow and variable displacement pump



Ag. 4, 1964 J. F. CARNER L 3,143,079

l REVERSIBLE DISCHARGE FLOW AND VARIABLE DISPLACEMENT PUMP Filed Aug. 7,1961 2 Sheets-Sheet 1 E 4 1964. '.1.1|=. :ARNE1'R' 3,143,079

REVERSIBLE DISCHARGE -FLOWAND VARIABLE DISPLACEMENT PUMP Filed Aug. '7,1961 l v `2 Sheets-Sheet 2 United States Patent() 3,143,079 REVERSIBLEDISCHARGE FLW AND VARABLE DISPLACEMENT P James F. Carrier, 17370 GrandAve., Eisinore, Calif. Fiied Aug. 7, 1961, Ser. No. 129,697 Claims. (Cl.103-120) This invention relates to a reversible discharge ow andvariable displacement pump and comprises an improvement on my previousPatent No. 2,685,255, dated August 3, 1954.

An object of my invention is to provide a pump of the character statedwhich is capable of supplying fluid at any desired rate of ow within thering of the pump by means of a single adjustment which may be made tothe pump while it is operating. The pump also permits reversal of thedirection of How from the pump during operation thereof by the samemeans which is employed in controlling the rate of uid discharge fromthe pump. By this means I eliminate various intricate pipes and valveswhich were heretofore required for this purpose.

Another object of my invention is to provide a novel pump of thecharacter stated which is so constructed that the cylinders for theadjusting yoke are so mounted on the body of the pump that possibleleakage between the cylinders and the body is eliminated.

Another object of my invention is to provide a novel pump of thecharacter stated in which the adjusting yoke is formed with integralpistons on both sides thereof. By this means the adjusting yoke is movedwithin the pump as required.

Still another object is to construct the main case in two complementaryhalves, which simplies the construction of the case and permitsmachining of the inner surfaces thereof.

Other objects, advantages and features of invention may appear from theaccompanying drawings, the subjoined detailed description and theappended claims.

In the drawings:

FIGURE l is a vertical sectional view of my reversible discharge flowand variable displacement pump.

FIGURE 2 is a fragmentary sectional view taken on line 2 2 of FIGURE 1.

FIGURE 3 is a fragmentary sectional view taken on line 3 3 of FIGURE l.

FIGURE 4 is a side view of one of the complementary housing halves ofthe pump.

FIGURE 5 is a side view of one of the vanes.

Referring more particularly to the drawing, the numeral 1 indicates theouter housing of the pump which is formed in two complementary halves 2and 3. The housing halves are both planed off to form a flat surface, asshown at 4 and 5, and these surfaces are diametrically opposed. Thepurpose of the flat surfaces 4 and S is to accommodate cylinders 6 and 7respectively, which are bolted to the housing and which serve as a meansto move or adjust the adjusting yoke, as will be subsequently described.The housing sections 2 and 3 are bolted together in the usual machinerypractice, as are also the cylinders 6 and 7. Suitable O-rings orpackings 8 and 9 seal off between the housing and the cylinders 6 and 7respectively, thus preventing leakage between the housing and thecylinders. A sleeve 10 is bolted to the outer face of the housing part 2and this sleeve carries suitable bearings of the drive shaft 11 whichextends into the case for the purpose of driving the pump, as will besubsequently described. The shaft 11 has a rotor 12, either integralwith the inner end of the shaft or suitably iixedly attached thereto,and a bearing 13 supports the rotor and the inner end of the shaft 11.The rotor 12 is positioned within the pumping chamber 14 of the housing1, and this pumping chamber entirely surrounds the rotor,

lCC y as shown in FGURE l. A pair of ports 15 and 16 extend through thehousing section 3 and thence into the pumping chamber 14. The ports 15and 16 may be either intake or outlet ports, depending on the directionof rotation of the rotor 12 of the pump. The ports 15 and 16 extend intothe side of the pump chamber 14, substantially as shown in FIGURE 2.

An adjusting yoke 17 is circular in shape and is positioned within thepumping chamber 14. The yoke 17 is formed with two integral pistons 1Sand 19 which are oppositely positioned on the yoke and which pistons titinto the cylinders 6 and 7 respectively. The pistons 1S and 19 enablethe yoke 17 to be adjusted to various eccentric positions Within thechamber 14 by either exerting hydraulic or pneumatic pressure on thepistons 18-19 as, for example, through the port 20, or an adjusting rod21 may be attached to one or both of the pistons. The adjusting yoke 17can thus be moved to vary the displacement of the pump, and also toelect reversal of the discharge if desired.

The yoke 17 is formed as a recessed annular structure which has aperipheral wall 22 and one side wall 23. The other side of the yoke isopen to permit the rotor 12 to enter. At the top and the bottom of theyoke 17 1 provide arcuate ports 24 and 25, which ports extend throughthe wall 23. The ports 24 and 25 permit uid to move into and out of theadjusting yoke 17 through the ports 1S and 16, that is, depending uponwhether the port 15 is an intake port, then iiuid will enter the yoke 17through the arcuate opening 24 and will leave or discharge through theopening 25 and the port 16. To support the yoke 17 on one side and toprevent tilting of the yoke, I provide two short blocks 26 and 27, whichproject from the housing half 2 and will bear against one verticalfaceof the yoke 17.

Within the rotor 12 I provide a plurality of radially extending vanes28, the outer ends of which bear against a ring 29 which is freelyrotatable within the yoke 17 and rotates with the vanes. The inner endsof the vanes engage the periphery of a bearing 30, the bearing beingfixedly attached to the rear Wall 23 of the yoke 17, that is, thebearing may be bolted to this wall. To prevent pressure accumulation atthe inner ends of the vanes 28, and within the space surrounding thebearing 30, the sides of the vanes may be planed off, as shown at 31, sothat the fluid can by-pass these vanes Without a retarding action on therotor and without any pumping action at this point. The pumping actionwill be around the outer periphery of the rotor 12 and on the inside ofthe ring 29. The fluid will enter and leave the spaces between thevarious vanes in an axial direction, and will both enter and leave thepump axially through the ports 15-16, as previously described.

In Operation The rotor 12 is continuously rotated through the shaft 11,thus moving the vanes 28 within the shift yoke 17. The rotor 12 moveseccentrically within the shift yoke 17, thus creating a pumping actionwithin the shift yoke as the vanes 28 rotate. The bearing 30 engagingthe inner ends of the vanes 28 will move these vanes radially throughthe rotor 12, as the shift yoke 17 is moved from side to side within thehousing 1. The shift yoke 17 is moved through the medium of the pistons18 and 19, either manually or by hydraulic or pneumatic pressure. Thepumping duid moves into the spaces between the vanes 28 through the port15, for example, thence through the arcuate opening 24, and finally outthrough the outlet opening 25 and the outlet port 16; the movement ofthe fluid being thus axial with relation to the drive shaft 11.

The cylinders 6 and 7 are mounted on the flat finished surfaces 4 5respectively, and are sealed off by the packis ing 8 and 9 respectively.Thus the cylinders can be properly aligned with the shift yoke 17, andalso these cylinders can be easily removed and replaced when Worn.

Having described my invention, I claim:

1. In a reversible discharge ilow and variable displacement pumpcomprising a housing, said housing having a chamber therein, a rotorconcentrically journaled in said chamber, a shaft attached to said rotorto drive the same, a plurality of radially extending vanes slidablymounted in said rotor for radial movement, a shift yoke slidably mountedin said housing for movement relative to the rotor, means on the yokeengaging the inner radial ends of the vanes, oppositely positioned andradially extending pistons on said yoke, cylinders detachably mounted onthe housing, said pistons extending into the cylinders, said housingincluding a flat sealing surface thereon to receive the cylinders, saidshift yoke having a recess formed therein to receive said vanes, saidrecess being larger in diameter than the rotor to provide pumpingchambers between the rotor and the peripheral surface of the recess,said housing having a uid inlet and a fluid outlet therein, bothextending axially, a vertical wall on one side of said shift yoke, saidwall having a pair of arcuate openings therethrough, said arcuateopenings communieating with the pumping chambers in all positions of theparts whereby the pumping chambers are successively opened to the inletport and the outlet port, and a ring rotatably mounted on the innercircular face of said shift yoke, the outer ends of the vanes sealinglyengaging said ring.

2. In a reversible discharge flow and variable displacement pumpcomprising a housing, said housing having a chamber therein, a rotorconcentrically journaled in said chamber, a shaft attached to said rotorto drive the same, a plurality of radially extending vanes slidablymounted in said rotor for radial movement, a shift yoke slidably mountedin said housing for movement relative to the rotor, means on the yokeengaging the inner radial ends of the vanes, oppositely positioned andradially extending pistons on said yoke, cylinders detachably mounted onthe housing, said pistons extending into the cylinders, said housingincluding a at sealing surface thereon to receive the cylinders, saidshift yoke having a recess formed therein to receive said vanes, saidrecess being larger in diameter than the rotor to provide pumpingchambers between the rotor and the peripheral surface of the recess,said housing having a fluid inlet and a iluid outlet therein, bothextending axially, a vertical Wall on one side of said shift yoke, saidwall having a pair of arcuate openings therethrough, said arcuateopenings communicating with the pumping chambers in all positions of theparts whereby the pumping chambers are successively opened to the-inletport and the outlet port, and bearing blocks projecting from saidhousing and bearing against one vertical face of the shift yoke tosupport said shift yoke.

3. In a reversible discharge flow and variable displacement pumpcomprising a housing, said housing having a chamber therein, a rotorconcentrically journaled in said chamber, a shaft attached to said rotorto drive the same, a plurality of radially extending vanes slidablymounted in said rotor for radial movement, a shift yoke slidably mountedin said housing for movement relative to the rotor, means on the yokeengaging the inner radial ends of the vanes, oppositely positioned andradially extending pistons on said yoke, cylinders detachably mounted onthe housing, said pistons extending into the cylinders, said housingincluding a flat sealing surface thereon to receive the cylinders, saidshift yoke having a recess formed therein to receive said vanes, saidrecess being larger in diameter than the rotor to provide pumpingchambers between the rotor and the peripheral surface of the recess,said housing having a i'luid inlet and a fluid outlet therein,

both extending axially, a vertical wall on one side of said shift yoke,said wall having a pair of arcuate openings therethrough, said arcuateopenings communicating with the pumping chambers in all positions of theparts whereby the pumping chambers are successively opened to the inletport and the outlet port, and bearing blocks projecting from saidhousing and bearing against one vertical face of the shift yoke tosupport said shift yoke, and a ring rotatably mounted on the innercircular face of said shift yoke, the outer ends of the vanes sealinglyengaging said ring.

4. In a reversible discharge flow and variable displacement pumpcomprising a housing, said housing having a chamber therein, a rotorconcentrically journaled in said chamber, a shaft attached to said rotorto drive the same, a plurality of radially extending vanes slidablymounted in said rotor for radial movement, a shift yoke slidably mountedin said housing for movement relative to the rotor, means on the yokeengaging the inner radial ends of the vanes, oppositely positioned andradially extending pistons on said yoke, cylinders detachably mounted onthe housing, said pistons extending into the cylinders, said housingincluding a flat sealing surface thereon to receive the cylinders, saidshift yoke having a recess formed therein to receive said vanes, saidrecess being larger in diameter than the rotor to provide pumpingchambers between the rotor and the peripheral surface of the recess,said housing having a iluid inlet and a fluid outlet therein, bothextending axially, a vertical wall on one side of said shift yoke, saidWall having a pair of arcuate openings therethrough, said arcuateopenings communicating with the pumping chambers in all positions of theparts whereby the pumping chambers are successively opened to the inletport and the outlet port, a bearing mounted in said vertical Wall, theinner radial ends of the vanes resting on said bearing.

5. In a reversible discharge ow and variable displacement pumpcomprising a housing, said housing having a chamber therein, a rotorconcentrically journaled in said chamber, a shaft attached to said rotorto drive the same, a plurality of radially extending varies slidablymounted in said rotor for radial movement, a shift yoke slidably mountedin said housing for movement relative to the rotor, means on the yokeengaging the inner radial ends of the vanes, oppositely positioned andradially extending pistons on said yoke, cylinders detachably mounted onthe housing, said pistons extending into the cylinders, said housingincluding a fiat sealing surface thereon to receive the cylinders, saidshift yoke having a recess formed therein to receive said vanes, saidrecess being larger in diameter than the rotor to provide pumpingchambers between the rotor and the peripheral surface of the recess,said housing having a fluid inlet and a lluid outlet therein, bothextending axially, a Vertical wall on one side of said shift yoke, saidWall having a pair of arcuate openings therethrough, said arcuateopenings communicating with the pumping chambers in all positions of theparts Whereby the pumping chambers are successively opened to the inletport and the outlet port, and a ring rotatably mounted on the innercircular face of said shift yoke, the outer ends of the varies sealinglyengaging said ring, a bearing mounted in said vertical wall, the innerradial ends of the vanes resting on said bearing.

References Cited in the file of this patent UNITED STATES PATENTS1,943,929 Rayburn Jan. 16, 1934 2,049,092 Sturm July 28, 1936 2,685,255Carner Aug. 3, 1954 2,782,724 Humphreys Feb. 26, 1957 FOREIGN PATENTS202,525 Australia July 13, 1956

1. IN A REVERSIBLE DISCHARGE FLOW AND VARIABLE DISPLACEMENT PUMPCOMPRISING A HOUSING, SAID HOUSING HAVING A CHAMBER THEREIN, A ROTORCONCENTRICALLY JOURNALED IN SAID CHAMBER, A SHAFT ATTACHED TO SAID ROTORTO DRIVE THE SAME, A PLURALITY OF RADIALLY EXTENDING VANES SLIDABLYMOUNTED IN SAID ROTOR FOR RADIAL MOVEMENT, A SHIFT YOKE SLIDABLY MOUNTEDIN SAID HOUSING FOR MOVEMENT RELATIVE TO THE ROTOR, MEANS ON THE YOKEENGAGING THE INNER RADIAL ENDS OF THE VANES, OPPOSITELY POSITIONED ANDRADIALLY EXTENDING PISTONS ON SAID YOKE, CYLINDERS DETACHABLY MOUNTED ONTHE HOUSING, SAID PISTONS EXTENDING INTO THE CYLINDERS, SAID HOUSINGINCLUDING A FLAT SEALING SURFACE THEREON TO RECEIVE THE CYLINDERS, SAIDSHIFT YOKE HAVING A RECESS FORMED THEREIN TO RECEIVE SAID VANES, SAIDRECESS BEING LARGER IN DIAMETER THAN THE ROTOR TO PROVIDE PUMPINGCHAMBERS BETWEEN THE ROTOR AND THE PERIPHERAL SURFACE OF THE RECESS,SAID HOUSING HAVING A FLUID INLET AND A FLUID OUTLET THEREIN, BOTHEXTENDING AXIALLY, A VERTICAL WALL ON ONE SIDE OF SAID SHIFT YOKE, SAIDWALL HAVING A PAIR OF ARCUATE OPENINGS THERETHROUGH, SAID ARCUATEOPENINGS COMMUNI-